package com.hou.houlymall.auth.web;

import com.alibaba.fastjson.TypeReference;
import com.hou.common.constant.AuthServerConstant;
import com.hou.common.exception.BizCodeEnum;
import com.hou.common.utils.R;
import com.hou.common.vo.MemberRespVo;
import com.hou.houlymall.auth.feign.MemberFeignService;
import com.hou.houlymall.auth.feign.ThirdPartyFeignService;
import com.hou.houlymall.auth.vo.UserLoginVo;
import com.hou.houlymall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.DefaultMessageSourceResolvable;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author H
 * @create 2021-08-13 16:12
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;


    /**
     * 短信验证码请求
     * @param phone ...
     * @return ...
     */
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        //TODO 1、接口防刷。
        String codeGot = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(codeGot)) {
            long l = Long.parseLong(codeGot.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60 秒之内不能再发
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        // 验证码生成与发送
        String codeForSend = UUID.randomUUID().toString().substring(0, 5);

        thirdPartyFeignService.sendCode(phone, codeForSend);

        //2、验证码的再次校验.redis.存key-phone，value-code    sms:code:13125126150 -> 1243
        String codeForSave = codeForSend + "_" + System.currentTimeMillis();
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, codeForSave, 10, TimeUnit.MINUTES);
        //redis缓存验证码，防止同一个电话号码在60秒内再次发送验证码

        return R.ok();
    }


    /**
     *
     * //TODO 重定向携带数据，利用session原理。将数据放在session中。
     *  只要跳到下一个页面取出这个数据以后，session里面的数据就会删掉。
     *
     * //TODO 1、分布式下的session问题
     * RedirectAttributes redirectAttributes: 模拟重定向携带数据
     *
     * 注册请求
     * @param vo ...
     * @param result ...
     * @param redirectAttributes ...
     * @return ...
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors =
                    result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField
                            , DefaultMessageSourceResolvable::getDefaultMessage));

            redirectAttributes.addFlashAttribute("errors", errors);
            //校验出错，转发到注册页
            //重定向必须写上完整路径
            return "redirect:http://auth.houlymall.com/reg.html";
        }

        //1、校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码;令牌机制（验证码工作核心原理）
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过。 //真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //成功
                    //注册成功回到首页，回到登录页
                    return "redirect:http://auth.houlymall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>() {
                    }));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.houlymall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                //校验出错，转发到注册页
                return "redirect:http://auth.houlymall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.houlymall.com/reg.html";
        }

    }


    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null){
            //没登陆
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){
        //远程登录
        R r = memberFeignService.login(vo);
        if (r.getCode()==0){
            //成功
            MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>(){});
            //成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://houlymall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.houlymall.com/login.html";
        }
    }

}




